lvextend in thinpool fails with Insufficient free space:5110 extents needed, but only 0 available

Solution Verified - Updated -

Issue

  • lvextend in thinpool fails with Insufficient free space: 5110 extents needed, but only 0 available, when lvs is 70% used and thin pool tries to extend the lv using the policies defined in lvm.conf.
  • The filesystem associated with thin LVM automatically umounts after a while.

Environment

  • Red Hat Enterprise Linux(RHEL) 7

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